kotlin-stdlib/kotlin.collections/containsAll

containsAll

inline fun <T> Collection<T>.containsAll(elements: Collection<T>): Boolean

Checks if all elements in the specified collection are contained in this collection.

Allows to overcome type-safety restriction of containsAll that requires to pass a collection of type Collection<E>.

Samples

import samples.*
import kotlin.test.*
fun main() { 
   //sampleStart 
   val collection = mutableListOf('a', 'b')
val test = listOf('a', 'b', 'c')
assertFalse(collection.containsAll(test))

collection.add('c')
assertTrue(collection.containsAll(test)) 
   //sampleEnd
}